Date: Fri, 18 May 2012 02:06:34 +0000 (UTC) From: Glen Barber <gjb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r235590 - stable/8/share/man/man4 Message-ID: <201205180206.q4I26YLE029090@svn.freebsd.org>
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Author: gjb (doc committer) Date: Fri May 18 02:06:34 2012 New Revision: 235590 URL: http://svn.freebsd.org/changeset/base/235590 Log: Document requirement to alter some sysctls when using igb(4) with jumbo frames. PR: 153738 Modified: stable/8/share/man/man4/igb.4 Directory Properties: stable/8/share/man/man4/ (props changed) Modified: stable/8/share/man/man4/igb.4 ============================================================================== --- stable/8/share/man/man4/igb.4 Fri May 18 02:06:10 2012 (r235589) +++ stable/8/share/man/man4/igb.4 Fri May 18 02:06:34 2012 (r235590) @@ -31,7 +31,7 @@ .\" .\" $FreeBSD$ .\" -.Dd May 14, 2010 +.Dd May 12, 2012 .Dt IGB 4 .Os .Sh NAME @@ -160,6 +160,14 @@ The minimum is 80, and the maximum is 40 .It Va hw.igb.enable_aim If set to 1, enable Adaptive Interrupt Moderation. The default is to enable Adaptive Interrupt Moderation. +.It Va kern.ipc.nmbclusters +The maximum number of mbuf clusters allowed. +If the system has more than one igb card or jumbo frames are +enabled, this value will need to be increased. +.It Va kern.ipc.nmbjumbo9k +The maximum number of mbuf 9k jumbo clusters allowed. +Increasing this to allow for at least 8192 extra clusters +per interface can allow for an mtu of 8192. .El .Sh DIAGNOSTICS .Bl -diag
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